A mould which has good erosion resistance to metal flow and is also collapsible is

Related MCQs

• If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as
• The defect known as 'drop' occurs when the upper surface of the mould cracks and pieces of sand fall into the molten metal. This defect occurs due to
• A defect in castings in which a discontinuity is formed due to the imperfect fusion of two streams of metal in the mould cavity is known as
• A casting process which can produce cylinders by inserting cores into molten metal poured in the mould is
• Which of the following is used on moulds for magnesium castings to prevent metal mould reactions?
• Permanent mould casting is also known as
• During the passage of molten metal through the coke, the carbon percentage of the molten metal increases. The absorption of carbon depends on
• Which of the following facilitates shaking and lifting large pattern from the mould?
• The hardness of the mould is affected by the proportion of ingredients in the sand and
• Sand grains which give high mould strength are